Comments on: difference between the objective lens of a microscope and that of a telescope? http://www.telescopebuyingguide.com/blog/difference-between-the-objective-lens-of-a-microscope-and-that-of-a-telescope/ Thu, 17 May 2012 19:55:26 +0000 http://wordpress.org/?v=2.7 hourly 1 By: pieall2003 http://www.telescopebuyingguide.com/blog/difference-between-the-objective-lens-of-a-microscope-and-that-of-a-telescope/comment-page-1/#comment-1256 pieall2003 Fri, 20 Mar 2009 01:43:00 +0000 http://www.telescopebuyingguide.com/blog/difference-between-the-objective-lens-of-a-microscope-and-that-of-a-telescope/#comment-1256 First I have to ask you if it is a reflecting telescope or an astronomical telescope. Fot the reflecting telescope, it is a mirror , for the astronomical telescope, the objective is a converging lens. I presume that your question is for a astronomical telescope. Soo. The difference is in the focal lenght.. The objective of a telescope has a very long focal lenght, over 1meter, 2 meters and more. the focal lenght of a microscope is very small, less than .01m The object is always in front of the lens for both, for the telescope the object is at infinity . For the microscope the object is near the focus. Both lens produce real images, inverted, . These real image become object for the eyepiece and are situated inside the focus of the eyepiece.The final image is then virtual and may be seen only if you look inside the eyepiece.. good luck P.A. First I have to ask you if it is a reflecting telescope or an astronomical telescope. Fot the reflecting telescope, it is a mirror , for the astronomical telescope, the objective is a converging lens. I presume that your question is for a astronomical telescope. Soo.

The difference is in the focal lenght..

The objective of a telescope has a very long focal lenght, over 1meter, 2 meters and more.

the focal lenght of a microscope is very small, less than .01m

The object is always in front of the lens for both, for the telescope the object is at infinity . For the microscope the object is near the focus.

Both lens produce real images, inverted, . These real image become object for the eyepiece and are situated inside the focus of the eyepiece.The final image is then virtual and may be seen only if you look inside the eyepiece..

good luck
P.A.

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